This problem is caused by this issue:
https://github.com/actions/checkout/issues/1809
Several comments include documentation on various environment variables
to force it to use the older nodejs release still, but probably those
various workarounds will stop working eventually.
Fixes#1533 and #1534
Memsetting `turn_params.default_users_db` before reading conf file, not
after.
Because auth is read in first iteration so secret was wiped out.
# test plan
Add new test script that uses config file to setup turnserver instead of
cli arguments and confirm it works (fails without the change)